SUN HYDRAULICS
NCGCLEN

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics NCGCLEN (NCGCLEN) is a needle valve with a reverse-flow check, designed to provide fully adjustable flow regulation. This component allows for infinite adjustment from fully closed to the maximum orifice diameter, making it versatile for various flow control applications. It features an integral high-capacity check valve that ensures unrestricted flow from port 2 to port 1, although it is not pressure compensated. The valve's design includes a balanced adjustment mechanism for ease of use even at high pressures and a sharp-edged orifice to minimize flow variations due to changes in viscosity. The needle valve incorporates Sun's floating style construction to prevent internal parts from binding due to excessive installation torque or machining variations. It fits into the T-18A cavity and belongs to the Series 4 capacity, capable of handling up to 30 gpm (120 L/min) with a maximum operating pressure of 5000 psi (350 bar). The maximum leakage rate is specified at 5 drops per minute at 110 SUS (24 cSt). Adjustment from fully closed to fully open requires approximately 5.5 counterclockwise turns. Physical specifications include a valve hex size of 1-5/8 inches (41.3 mm), installation torque between 350 and 375 lbf-ft (474 - 508 Nm), an internal hex size for the adjustment screw of 5/32 inches (4 mm), and a locknut hex size of 9/16 inches (15 mm) with a torque requirement of 80 - 90 lbf-in (9 - 10 Nm). The model weighs approximately 3.00 lb (1.35 kg) and uses Viton seals, with seal kit part number 990018006 available for maintenance purposes.